Major league baseball is a game of many time-tested traditions. A newer and more idiosyncratic custom, however, is its promotion of "Official and Commemorative Artists," whose job is to capture the All Star games and World Series as works of art and as images that may be reproduced as saleable mementos. The practice opens up a small but lucrative field for contemporary painters with the right stuff. The Commemorative Artist for both the 2007 Major League Baseball All Star Game in San Francisco and the current 2007 World Series in Boston is Brian Fox, a sports artist based in Somerset, Mass.